Imagine that you have a collection of data (such as a list sales orders, a set of service tickets, or a directory of contacts), and that you want to show this data in your Microsoft PowerApps app in a tabular format, where each column represents a field and each row represents a record. In the past, you might have been able to roughly simulate this visualization, although the process required some effort. However, we've been listening to your requests and are happy to announce that you can now quickly and easily achieve this very typical visualization by using the new Data table control that has been recently added to PowerApps.
Reference:
https://powerapps.microsoft.com/fr-fr/blog/introducing-the-data-table-control/